build system: Introduce nosharedlibs variable.

Introduce a new build variable "nosharedlibs".

In tools/libxc use it instead of $(stubdom).
In tools/xenstore honour it, and build static clients.

If shared libs are disabled, do not try to install or symlink them.

Set nosharedlibs when building for MiniOS or NetBSDRump.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>

---
v2: Clarify deliberate INSTALL_SHLIB and SYMLINK_SHLIB breakage.

config/MiniOS.mk

@@ -7,3 +7,4 @@ LDFLAGS += $(DEF_LDFLAGS) $(ARCH_LDFLAGS)
 
 # Override settings for this OS
 PTHREAD_LIBS =
+nosharedlibs=y

config/NetBSDRump.mk

@@ -8,3 +8,4 @@ XEN_LOCK_DIR = /var/lib
 WGET = ftp
 
 XENSTORE_XENSTORED=n
+nosharedlibs=y

tools/Rules.mk

@@ -21,9 +21,18 @@ CFLAGS_xeninclude = -I$(XEN_INCLUDE)
 
 XENSTORE_XENSTORED ?= y
 
+ifneq ($(nosharedlibs),y)
 INSTALL_SHLIB = $(INSTALL_PROG)
 SYMLINK_SHLIB = ln -sf
 libextension = .so
+else
+libextension = .a
+XENSTORE_STATIC_CLIENTS=y
+# If something tries to use these it is a mistake.  Provide references
+# to nonexistent programs to produce a sane error message.
+INSTALL_SHLIB = : install-shlib-unsupported-fail
+SYMLINK_SHLIB = : symlink-shlib-unsupported-fail
+endif
 
 CFLAGS_libxenctrl = -I$(XEN_LIBXC) $(CFLAGS_xeninclude)
 LDLIBS_libxenctrl = $(XEN_LIBXC)/libxenctrl$(libextension)

tools/libxc/Makefile

@@ -109,16 +109,16 @@ $(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) $(OSDEP_LIB_OBJS) \
 $(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS) $(OSDEP_PIC_OBJS) : CFLAGS += -include $(XEN_ROOT)/tools/config.h
 
 LIB := libxenctrl.a
-ifneq ($(stubdom),y)
+ifneq ($(nosharedlibs),y)
 LIB += libxenctrl.so libxenctrl.so.$(MAJOR) libxenctrl.so.$(MAJOR).$(MINOR)
 endif
 
 LIB += libxenguest.a
-ifneq ($(stubdom),y)
+ifneq ($(nosharedlibs),y)
 LIB += libxenguest.so libxenguest.so.$(MAJOR) libxenguest.so.$(MAJOR).$(MINOR)
 endif
 
-ifneq ($(stubdom),y)
+ifneq ($(nosharedlibs),y)
 LIB += xenctrl_osdep_ENOSYS.so
 endif
 

tools/xenstore/Makefile

@@ -28,7 +28,10 @@ LIBXENSTORE := libxenstore.a
 xenstore xenstore-control: CFLAGS += -static
 endif
 
-ALL_TARGETS = libxenstore.so libxenstore.a clients
+ALL_TARGETS = libxenstore.a clients
+ifneq ($(nosharedlibs),y)
+ALL_TARGETS += libxenstore.so
+endif
 ifeq ($(XENSTORE_XENSTORED),y)
 ALL_TARGETS += xs_tdb_dump xenstored
 endif